.nato-study{background:#f1f6f7;min-height:100dvh;color:#142d36}.nato-top{display:flex;align-items:center;gap:16px;padding:18px max(18px,calc((100vw - 840px)/2));border-bottom:1px solid #dce7e8;background:#fff;position:sticky;top:0;z-index:5}.nato-top small{font-size:10px;font-weight:800;color:#087c83;letter-spacing:.8px}.nato-top h1{font-size:20px;margin:3px 0}.nato-count{margin-left:auto;font-size:13px;white-space:nowrap}.nato-content{max-width:840px;margin:auto;padding:32px 20px 60px}.nato-intro h2,.nato-question h2,.nato-result h2{font-size:30px;line-height:1.2;margin:8px 0 14px}.nato-intro p,.nato-result p{color:#526873;line-height:1.6}.nato-alphabet{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.nato-alphabet button{display:flex;align-items:center;gap:13px;text-align:left;background:white;border:1px solid #d9e5e4;padding:16px;border-radius:14px;min-height:58px}.nato-alphabet b{font-size:24px;color:#087b83;width:25px}.nato-alphabet span{font-size:15px}.nato-alphabet small{margin-left:auto;color:#65858a}.nato-spell{display:grid;gap:8px;margin:24px 0 0;font-weight:700}.nato-study input{font-size:18px;border:1px solid #a9c4c8;border-radius:12px;padding:14px;width:100%;min-width:0;background:white;color:#152f37}.nato-spelled{min-height:48px;background:#e4f2ef;border-radius:12px;padding:14px;font-size:14px;line-height:1.6;overflow-wrap:anywhere}.nato-source,.nato-local{font-size:13px;line-height:1.6;color:#587079;margin:24px 0}.nato-source a{color:#087c83}.nato-modes{display:grid;gap:12px;margin-top:24px}.nato-modes button{text-align:left;display:grid;grid-template-columns:90px 1fr;gap:5px 16px;background:white;border:1px solid #d5e4e5;border-radius:18px;padding:23px}.nato-modes button>span{grid-row:span 2;align-self:center;color:#087c83;font-size:22px;font-weight:850}.nato-modes strong{font-size:18px}.nato-modes small{font-size:14px;color:#5b737c}.nato-track{height:5px;background:#dbe7e7;border-radius:8px;margin-bottom:24px;overflow:hidden}.nato-track span{display:block;height:100%;background:#0fb7c1}.nato-symbol{display:grid;place-items:center;min-height:140px;border-radius:24px;background:#dcefe9;font-size:clamp(48px,9vw,85px);font-weight:850;margin:20px 0;overflow-wrap:anywhere}.nato-choices{display:grid;grid-template-columns:1fr 1fr;gap:12px}.nato-choices button{border:1px solid #c1d8d9;border-radius:15px;min-height:64px;font-size:20px;font-weight:750;background:white;color:#193641;padding:12px}.nato-choices .correct{background:#d8f1df;border-color:#569867}.nato-choices .wrong{background:#fae3e0;border-color:#bf7268}.nato-choices button:disabled{opacity:1}#natoAnswerForm{display:grid;gap:12px}.nato-feedback{display:flex;flex-direction:column;gap:6px;background:#dff3e8;padding:18px;border-radius:15px;margin:16px 0}.nato-feedback.wrong{background:#fff0df}.nato-feedback[hidden],.nato-next[hidden]{display:none}.nato-back{display:block;margin:18px auto;background:none;border:0;color:#52727b;min-height:44px;text-decoration:underline}.nato-result{background:white;padding:32px;border-radius:24px}.nato-result ul{padding:0;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:24px 0}.nato-result li{padding:12px;background:#edf4f3;border-radius:10px}.nato-result .primary,.nato-result .secondary{display:block;width:100%;margin-top:12px}.nato-study button:focus-visible{outline:3px solid #0ebcc6;outline-offset:3px}.nato-top button{min-height:44px}.nato-audio-status{font-size:13px}
@media(max-width:560px){.nato-top{padding:12px;gap:10px}.nato-top h1{font-size:17px}.nato-top small{font-size:8px}.nato-top button{padding:10px;font-size:12px}.nato-content{padding:24px 16px 40px}.nato-alphabet{grid-template-columns:1fr 1fr}.nato-alphabet button{padding:13px 10px;gap:7px}.nato-alphabet span{font-size:14px}.nato-intro h2,.nato-question h2,.nato-result h2{font-size:26px}.nato-symbol{min-height:112px;margin:16px 0}.nato-modes button{padding:18px;grid-template-columns:62px 1fr}.nato-modes button>span{font-size:17px}.nato-modes strong{font-size:16px}.nato-modes small{font-size:12px}.nato-result{padding:22px}.nato-choices button{font-size:18px;min-height:58px}}